直流电压施加对Pb/As复合污染土壤电动修复的影响

李亚林; 李鹏; 唐一凡; 张伟; 王恩赐; 靳明玉

doi:10.13205/j.hjgc.202208018

直流电压施加对Pb/As复合污染土壤电动修复的影响

doi: 10.13205/j.hjgc.202208018

1. 河南工程学院环境与生物工程学院, 郑州 451191;
2. 郑州大学生态与环境学院, 郑州 450052

基金项目:

国家自然科学基金(52000163)

河南省高等学校青年骨干教师培养计划(2019GGJS239)

河南省科技攻关项目(212102310064)

河南省高等教育教学改革研究与实践项目(2021SJGLX1028)

大学生创新创业训练计划项目(202111517002)

详细信息

通讯作者:
李亚林(1984-),男,博士,副教授,主要从事重金属污染土壤修复、污泥处理资源化和餐厨垃圾资源化等方向研究。li_ya_lin@haue.edu.cn

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出版历程
- 收稿日期: 2021-07-20
- 刊出日期: 2022-11-08

IMPACT OF DC VOLTAGE ON ELECTRO-REMEDIATION OF Pb AND As CONTAMINATED SOIL

1. College of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China;
2. College of Ecology and Environment, Zhengzhou University, Zhengzhou 450052, China

摘要

摘要: 重金属复合污染土壤的治理修复对环境污染防治具有重要意义。以河南某冶炼厂地表含Pb、As复合污染土壤为对象,通过施加不同直流电压对污染土壤进行电动修复,基于迁移率和形态变化对修复效果进行评价。修复过程中,分别对电流变化、Pb/As的迁移规律、土壤含水率、电导率、pH值以及Pb/As的形态转化进行研究。结果表明:施加的直流电压变化对土壤中Pb的迁移影响显著,而对As的迁移影响较弱;当施加直流电压为10 V时,土壤中阴极区域的As含量可降至43.18 mg/kg,当施加的直流电压为30 V时,土壤中阴极区域的Pb含量可降至334 mg/kg,先施加低压后施加高压更有利于提升Pb、As复合污染土壤的电动修复效果;修复完成后Pb和As的弱酸态占比降低,可还原态占比升高,土壤中的Pb和As含量低于GB 36600—2018《土壤环境质量建设用地土壤污染风险管控标准(试行)》中第1类建设用地筛选值。
- 电动修复 /
- 铅 /
- 砷 /
- 重金属形态 /
- 复合污染
Abstract: The remediation and restoration of soil contaminated by heavy metals is considered to be of great significance to the prevention and control of environmental pollution. In this paper, a complex contaminated soil on the surface with Pb and As in a smelter in Henan was taken as the research object. By applying different DC voltages, electrokinetic remediation was carried out. Then based on the mobility and form changes, the restoration effect was evaluated. During the restoration process, we studied the current change, Pb/As migration law, soil moisture content, electrical conductivity, pH value, and Pb/As speciation transformation. The results showed that the change of applied DC voltage had a stronger effect on the migration of Pb in the soil, but a weaker effect on the migration of As. When the applied DC voltage was 10 V, As content in the cathode region of the sample soil was reduced to 43.18 mg/kg; and when the applied DC voltage was 30 V, the Pb content in the cathode region was reduced to 334 mg/kg. The operation of applying low-voltage current first and then high-voltage current was more effective to improve the electrokinetic remediation effect of Pb and As compound contaminated soil. In the restored soil, the proportion of weak acid state of Pb and As decreased, and the proportion of reducible state increased. The content of Pb and As in soil was lower than the screening value for construction land Class Ⅰ in GB 36600—2018.
- electrokinetic remediation /
- lead /
- arsenic /
- heavy metal speciation /
- compound contamination

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参考文献(26)

[1]	贾默.基于生命周期理论的工业场地调查与识别研究[D].石家庄:河北科技大学,2020.
[2]	陈能场,郑煜基,何晓峰,等.《全国土壤污染状况调查公报》探析[J].农业环境科学学报,2017,36(9):1689-1692.
[3]	赵帅,王济,蔡雄飞,等.土壤铅污染物形态和生物影响分析及修复技术综述[J].现代化工,2020,40(12):8-12.
[4]	曾睿,胡志鑫,陈丹,等.砷污染土壤修复技术的研究与应用[J].环境与发展,2017,29(4):88-89.
[5]	侯隽,樊丽,周明远,等.电动及其联用技术修复复合污染土壤的研究现状[J].环境工程,2017,35(7):185-189.
[6]	AMRATE S,AKRETCHE D E.DTA enhanced electrokinetic remediation of lead contaminated soils[J].Chemosphere,2005,60(10):1376-1383.
[7]	纪冬丽,张竞,孟凡生,等.EK/Fe⁰-PRB联合修复实际砷污染土壤的协同机制[J].化工学报,2018,69(12):5276-5282.
[8]	任文涛,祝方,张婧,等.阳极pH对Fe(Ⅲ)强化阴极电动修复Pb污染土壤的影响[J].环境工程学报,2017,11(11):6184-6189.
[9]	RYU B G,PARK G Y,YANG J W,et al.Electrolyte conditioning for electrokinetic remediation of As,Cu and Pb-contaminated soil[J].Separation & Purification Technology,2011,79(2):170-176.
[10]	杨悦锁,陈煜,李盼盼,等.土壤、地下水中重金属和多环芳烃复合污染及修复研究进展[J].化工学报,2017,68(6):2219-2232.
[11]	生态环保部.土壤环境质量建设用地土壤污染风险管控标准(试行):GB 36600—2018[S/OL].http://www.mee.gov.cn/ywgz/fgbz/bz/bzwb/trhj/201807/t20180703_446027.shtml.
[12]	TOKALIOGLU S,YILMAZ V,KARTAL S,et al.An assessment on metal sources by multivariate analysis and speciation of metals in soil samples using the BCR sequential extraction procedure[J].CLEAN-Soil,Air,Water,2015,38(8):713-718.
[13]	李亚林,刘蕾,厉萌萌,等.基于多点位分析的铬污染土壤电动修复研究[J].科学技术与工程,2018,18(35):87-93.
[14]	林君锋,崔喜勤,王果,等.动电修复不同形态重金属污染土壤效果研究[J].环境工程学报,2010,4 (11):2585-2589.
[15]	SUN Z C,WU B,GUO P H,et al.Enhanced electrokinetic remediation and simulation of cadmium-contaminated soil by superimposed electric field[J].Chemosphere,2019,233:17-24.
[16]	KIM S O,KIM K W.Monitoring of electrokinetic removal of heavy metals in tailing-soils using sequential extraction analysis[J].Journal of Hazardous Materials,2001,85(3):195-211.
[17]	黎森,王敦球,于焕云.铅-砷交互作用影响小白菜生长及铅砷积累的效应研究[J].生态环境学报,2019,28(1):170-180.
[18]	ACAR Y B,ALSHAWABKEH A N.Principles of electro-kinetic remediation[J].Environmental Science & Technology,1993,27(13):2638-2647.
[19]	李瑞,吴波,王卅,等.高电场强度下污染土壤电动修复的关键参数分析[J].环境工程,2018,36(9):149-153.
[20]	曹俊,向斌,高焕方,等.磷酸盐稳定化处理铅污染土壤及铅的形态分析[J].环境工程学报,2016,10(10):6015-6020.
[21]	钟晓兰,周生路,黄明丽,等.土壤重金属的形态分布特征及其影响因素[J].生态环境学报,2009,18(4):1266-1273.
[22]	李亚林,刘蕾,王冰冰,等.污染土壤电动修复过程中铜的形态转化研究[J].工业安全与环保,2018,44(9):95-99.
[23]	杨秀敏,任广萌,李立新,等.土壤pH值对重金属形态的影响及其相关性研究[J].中国矿业,2017,26(6):79-83.
[24]	ZHOU D M,DENG C F,CANG L.Electrokinetic remediation of a Cu contaminated red soil by conditioning catholyte pH with different enhancing chemical reagents[J].Chemosphere,2004,56(3):265-273.
[25]	雷梅,陈同斌,范稚连,等.磷对土壤中砷吸附的影响[J].应用生态学报,2003,14(11):1989-1992.
[26]	王金翠,孙继朝,黄冠星,等.土壤中砷的形态及生物有效性研究[J].地球与环境,2011,39(1):32-36.